Study of the Efficiency of Vertical Drains by an FEM Method in Soil Treatment for Road Projects: Case of the Development and Bitumination Works of the ROCADE Porto-Novo in Benin  

作　　者：Cheikh Diallo Diène Vitouley Kossi Ghyslain Joël Mamadou Tine Apanda Mbongote Johnny Cheikh Diallo Diène;Vitouley Kossi Ghyslain Joël;Mamadou Tine;Apanda Mbongote Johnny(Laboratory of Modelling and Soils Mechanics, TRU Engineering Sciences (UFR SI), University Iba Der Thiam, Thies, Senegal;Laboratory of Modelling and Soils Mechanics, School of Electrical and Building (ESEBAT), Dakar, Senegal)

机构地区：[1]Laboratory of Modelling and Soils Mechanics, TRU Engineering Sciences (UFR SI), University Iba Der Thiam, Thies, Senegal [2]Laboratory of Modelling and Soils Mechanics, School of Electrical and Building (ESEBAT), Dakar, Senegal

出　　处：《Open Journal of Civil Engineering》2024年第3期435-455,共21页土木工程期刊（英文）

摘　　要：This article aims to study the efficiency of coupled vertical drains for the treatment of long-lasting compressible clay soils for the road project platform of the ring road of Porto Novo, capital of Benin. The experimental data allowed us to estimate a consolidation of 29% in 9 months, justifying the drainage of the soil. In order to study the efficiency of drainage, a FEM model was proposed simulating different scenarios. These include a drainless road, pavements equipped with vertical drains with meshes of 0.5 m 0.5 m, 1 m 1 m and 1.5 m 1.5 m respectively and horizontal drains. The results expressed in terms of variations in vertical stresses, effective stresses and shear deformations revealed significant variations in pavement performance depending on the mesh size of the vertical drains. The configuration with a mesh of 0.5 m 0.5 m showed the least deformations, thus indicating a reduction in deformations and better stress distribution. However, the other mesh configurations showed variable results, underlining the importance of choosing the right mesh for the specific project conditions.This article aims to study the efficiency of coupled vertical drains for the treatment of long-lasting compressible clay soils for the road project platform of the ring road of Porto Novo, capital of Benin. The experimental data allowed us to estimate a consolidation of 29% in 9 months, justifying the drainage of the soil. In order to study the efficiency of drainage, a FEM model was proposed simulating different scenarios. These include a drainless road, pavements equipped with vertical drains with meshes of 0.5 m 0.5 m, 1 m 1 m and 1.5 m 1.5 m respectively and horizontal drains. The results expressed in terms of variations in vertical stresses, effective stresses and shear deformations revealed significant variations in pavement performance depending on the mesh size of the vertical drains. The configuration with a mesh of 0.5 m 0.5 m showed the least deformations, thus indicating a reduction in deformations and better stress distribution. However, the other mesh configurations showed variable results, underlining the importance of choosing the right mesh for the specific project conditions.

关 键 词：PAVEMENT Vertical Drains Horizontal Drains Modelling Plaxis2D ROCADE de Porto-Novo 

分 类 号：TN9[电子电信—信息与通信工程]